But the local church authorities there refuse to disturb the grave for DNA testing based on a vague rumor.

and while checking the story, I learned that Shakespeare's sonnets have been encoded in DNA: from Nature...

The project, led by Nick Goldman of the European Bioinformatics Institute (EBI) at Hinxton, UK, marks another step towards using nucleic acids as a practical way of storing information — one that is more compact and durable than current media such as hard disks or magnetic tape... DNA packs information into much less space than other media. For example, CERN, the European particle-physics lab near Geneva, currently stores around 90 petabytes of data on some 100 tape drives.